/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
package l1j.jrwz.telnet.command;

import static l1j.jrwz.telnet.command.TelnetCommandResult.CMD_INTERNAL_ERROR;
import static l1j.jrwz.telnet.command.TelnetCommandResult.CMD_NOT_FOUND;

import java.util.StringTokenizer;

public class TelnetCommandExecutor {
    private static TelnetCommandExecutor _instance = new TelnetCommandExecutor();

    public static TelnetCommandExecutor getInstance() {
        return _instance;
    }

    public TelnetCommandResult execute(String cmd) {
        try {
            StringTokenizer tok = new StringTokenizer(cmd, " ");
            String name = tok.nextToken();

            TelnetCommand command = TelnetCommandList.get(name);
            if (command == null) {
                return new TelnetCommandResult(CMD_NOT_FOUND, cmd
                        + " not found");
            }

            String args = "";
            if (name.length() + 1 < cmd.length()) {
                args = cmd.substring(name.length() + 1);
            }
            return command.execute(args);
        } catch (Exception e) {
            return new TelnetCommandResult(CMD_INTERNAL_ERROR,
                    e.getLocalizedMessage());
        }
    }
}
